Plastic fuel tank

Abstract

A plastic fuel tank having polyethylene layers is disclosed. The polyethylene layer positioned as the outermost layer of the plastic fuel tank is a high-density polyethylene layer admixed with an ultraviolet inhibitor for minimizing transmission of ultraviolet light.

What is claimed is: 
     
       1. A plastic fuel tank including a tank assembly and a filler neck, comprising:
 an ethylene/vinyl alcohol layer for preventing fuel seepage; 
 an outermost polyethylene layer disposed on one side of the ethylene/vinyl alcohol layer; and 
 an innermost layer disposed on another side of the ethylene/vinyl alcohol layer, 
 wherein the outermost polyethylene layer and the innermost layer comprise a high-density polyethylene layer admixed with an ultraviolet inhibitor for minimizing transmission of ultraviolet light, 
 wherein the ultraviolet inhibitor is titanium oxide which acts as a white colorant, and is added in a compounding ratio within a range of from 0.04 to 0.50 wt %, and 
 wherein the tank assembly is provided to a general-purpose engine, the tank assembly having a protrusion protruding from a center part of the tank assembly, said protrusion being fittable into a recoil starter cover of the general-purpose engine. 
 
     
     
       2. The fuel tank of  claim 1 , further comprising at least one colorless recycled polyethylene layer interposed between the outermost layer and the innermost layer. 
     
     
       3. The fuel tank of  claim 1 , wherein the tank assembly is formed integrally with the filler neck.